Air drilling-machine



A. A. KLEIN.

MH DRILLING MACHINE.

APPUCATION HLED Nov. 21, |919.

2 SHEETS-SHEET l.

Witness, ewlbr A. A. KLEIN.

MR DRILUNG MACHINE. APPLICATION min Novl 21, |919.

2 SHEETSSHEET 2.

Alabama A KLBIN. InJenor Patented Jan. 18, 1921.

To allwmm 'it may concer-aL` UNITED smiles PATENT OFFICE.

A.a1a'11a1:rn A. xLE1N, or HoMEs'rEAD, PENNSLVANIA.

Ain Dalmine-Maquina."

" Be it known that I, ARTHUR A. KLEIN, a

citizen of I-iungaryyformerly a part of the` Austro-Hungarian Empire, y `residing at Homestead, in thecounty'of Alleghen and State of Pennsylvania-,haveinventec cer -tain new and useful Improvements in .Air Drilling`Machines"a of` which the following is aspecification. -V i The present invention "relatesto airfdrill` i ing machines and has `for its object `the provision of a newtypeof machine which by its convenient arrangement of working parts enables the device as a whole to producecon-l siderably more power for its silze than many of the machines in currentuse fordrilling purposes. Its portability due to its compact form is also a distinct advantage. These and other advantages willbe set out herein# after in this specification.

In the `accompanying y y part of this specification I have illustrated i one complete example of thephysicalfem- Ybodirnent of `my invention constructed according to the best mode `I have so far devised forthe practical applicationj of the principles of my invention. y y i Figure 1j of the drawings shows a central longitudinal section on line 1-1` of Fig. 3.

. Fig. 2 shows a sideview partlyV insection of the 4internal working` parts of the device as seen from the right of Fig. 3. y

Fig. 3 isla transversesection ofthe de? vice on line 3--3 of Fig. l..

Fig. 4 shows a`for1n of handle adaptedto be Yused in connection` with the device 1n hand.

of) preferablyA cylindrical shape, provided with an `interior chamberf 2; the latter being open at both ends anda; "Passing through thisfbhamber 2 is the drill;- spindlefywhich terminates at points 6 and 71.` Within the said spindle 5 `is revolubly i located the feed screw Bitprovidedfwith fa; screw thread` St` y preferably from points 10t`o 11, continuing with a diminish'eddiameterat12 to point 13, and terminating in a frustum at 14; The feedscrew at the end10`is provided with a iiattenedor nut-like head 15 having acontcaltapered endl. `The shellil is provided with a threaded shell or body cap 17, mountedon said shell at 18.` Said cap is hollow and of "circular shape Apreferably to" sult` the outer dimension of the shell 1 as shown. Numeral 19 represents a feed nut "screw- Specification of Letters Patent. Appuaaon "inea Ndvembefei, 1919. lseriaruo. 339,712.

drawings .forming The numeral'llindicates a shell of metal Patented J an.

threaded into the cap 17` at `2O as shown.

"" lhe 'drill spindle 5` is; carried by the shell 1` ina bearlng at 21, and inthebody cap` in..

bearing22. As there isa thrust from the right to the left as seen in Fig. 1,3on the drill spindle 5, a thrust bearing 23 with balls24` as shown is "provided fand also awsecond thrust Washer 25 to counteract the thrust ofthe drill spindle. The said spindlelf` has a conca`v1ty`26 terminating in a flattened` portion 27 to receive the ta ered shankof` an ordlnarycdrillfnot shown It is seen that if the nut shaped head l5 ofthe feed screw 8.; is operated: that the end-14 of same will dlsengage a drill in the cavity-265 and also.

whenithe feed bar is inwclosed position BSH shown in Fig. `1 and theend 16` placed against a rigid abutment (not shown)` that infthis1casebwhen. feed screw 8 is operated` to the left byfuslng a wrench to turn"` the headjl of same the device28 as afwholeis thereby `advanced `through the materialfin which the `drill in the cavity 26 is operating.` The .devlce'islprovided with an inlet handle 29 having a passage 31, a valvef32` and a andshutslo the pressure, supply of air tti.

thetoollitself `The outlet air handle r3() haa4 an' internal passage 35` as shown. jBothhanf, dles are` screw f threaded 1 preferably u into the interior parts of thedevice as shown* l sure on plunger iisreleased that the air s pressure 1n assage 31 closes the valve 32 `loo Within the shell 1 is a solidarieta].central` y housing 36, which is *of shape shown in :.Fig's. 1" and` 3 of the drawings, the two end portions 37,' 38 i of same `being connected by` the` parts 39,` 40. The crosssectional shape of? Partof 39is showninvFig. 3 dotted, .as

also the crosssection ofvpart 40, illustrated by the numerals zi1`to 44inclusive, lin said Fig. 3; handle :30 is mounted in block 40, and `itis seen that thezhandles 29 .and 30 bypassing through the shell 1,` preveljitlthe` rotation `orniovement of the central housing j 36 within the saidshell.k Loose on the drill spindle is a driving gear 50, having` a collar Vlike extension or hub 5l, on which isrigidly mountedv the turbine wheel 52 at point 53.

y5v This. gear. 50 and turbine wheel 52, are rev-V oluloly mounted on the drill spindle 5 ata;

p 55 representing a Babbitt-metalbushing-or bearingr for said vgear 30.

,The turbine wheel52 hasa series of cir- V cumferentially positioned pockets 56 by" Y means of which thev air undery pressure passing. throughpassages 3Li,57, drives or re-V Y 'volves the wheel 52, thereby rotating gear' 5Ofon'.the-*spindle 5. It'isnotedV in passi-ng l5 that there Aisla circumferential groove 58;

formed injhandle 29V so that there is always i free air Acommunication between passages'S-l andf57 as is readily understood. rl`he gear 50'is secured on spindle 5 by means of the i 2O shoulder 59 Vand the two vlockimits 60,61. The gear 50 drives a smaller gear62, on the Y shaft 63, the latter having vmounted thereon the worm or hub 6e which engages the worm l'gear 65 mountedon-the shaft 66, the latter f being also'niounted transversely'in the housturbine WheelV 52 is operated by the airun# ,y Y yder pressure from inlet passages 3l, 57, etc., that the motion is at once transmitted to the end7 of the drill spindle 5. 1t is'noted-that 40 astheairunder'pressure enters the pockets 56 ofturbine wheel 52 that the wheel 52 will'poperate ina clockwise direction as indicatedV by the arrow in Fig. 3. These little cupfuls of air Vare discharged as the wheel l 52` rotates into: the arc-shaped passage 73 v,formed inthe endportion 37 of the housing 36, the cross-"sectional shape ci' Vsaid passage 73` being shownin said' Figj From passage-73f`theexpelled `air passes through the substantially,:rectangular passage 7 Ll formed -in' the' housing 86, and' indicated by dotted lines intheFig 3, thence to the cylindrical chamber or outlet passage 35, formed inthe handle-8010i the drilling machine.' f Vllhe'n it is desired to'have a handle onthe deviceas. indicated inthe Fig. 4 ofthe vdraw'- ings,'theffeed screw. 8 is removed, and the handlev 75 inserted-inV the' feed nut-19A in itsrplacefso that the operator using the device holdsrsameby the handle 75 and holds the valve 32 open withy his hand on i lthe plunger 45 of thehandle29. It is noted .that th'e'interiori chambers within the mach'inei are filled withl oil, thereby `lubricating the moving parts and preventing leakage of the air under pressure used to operate the machine.

lt is seen also that the outlet handle 30 can be sheared on line 76 for some purposes when found desirable.

By means of my invention due to its superior mechanical arrangement of parts the available power 'obtained is increased from 5 to 10 fold, over the machines in present use; and whereas the latter ordinarily use from 80 to 100 lbs. air pressure the present inventionA can operate on trom llO to 50 lbs. of air pressure. The' mechanical advantage gained in operating on the turbine principle wherein the turbine wheel is `operated by air pressure on its circumference it is thought needs no further demonstration. lThe compactness of the present invention without the use of the usual compression air cylinders is also claimed to be a distinct advantage.' From the above description it is seen that I have provided a new device which is a distinct departure in this art possessing the advantages above described.

What l claim is:

1. ln a drilling machinean outer shell, a drill spindle rotatably mounted therein, a turbine mounted on the drill spindle, an internal gear on the drill spindle, and means for transmitting power from the turbine to the internal gear to drive said drill spindle.

2. In a drilling machine an outer shell, a

drill spindle mounted therein, a turbine on the drill spindle, a feed screw operating l within the drill spindle, an internal gear on the said spindle, and means for transmitting power from the turbine to the internal gear aforesaid.

3. In a drilling machine, an outer shell, a

drill spindlerotatably mounted therein, a

turbine and driving gear mounted on the drill spindle, an internal housing, a worm mounted in the same, a worm gear meshing with the said worm, means 'for transmitting power from the driving gear to the worm, an internal gear on the drive spindle, and means for operating'the internal gear and drill spindle with power obtained from the aforesaid worm gear.

4. Ina drilling machine, an inclosingV shell, adrill spindle rotatably mounted in the same, a turbine revolubly carried on the drill spindle, a fluid pressure inlet tube having a primary valve head and seat, a valve seat in the outer wall of said inlet tube, a valve head on the valve plunger stem forming' with the last mentioned valve seat, a secondary valve for operating alternately with the primary valve, an internal gear rigidly mounted on the drill spindle, and means for transmitting power from the turbine to the internal gear and rotatably operate same.

15. In a drilling machine a valve having an inlet pressure passage, and an outlet passage, a valve head andseat connectinr said passages, a valve plunger head ant seat forming a secondary Valve, to prevent leaka-gewhen the first mentioned Valve and seat are 1n an open posltlon. n

6. In a drllhng maehlne, a fiuld pressure inlet comprising a primary Valve for con`` trolling the Huid supply, a Valve head on the prlmary valve stem forming with its complementary valve seat a secondary valve 10 coacting alternately with the primary valve to prevent leakage when the latter `Valve is` in' an open positlon.

In testimony whereof I afx my signature. 

